<template>
    <div class="login_container">
        <el-row>
            <el-col :span="12" :xs="0"></el-col>
            <el-col :span="12" :xs="24">
                <el-form class="login_from" :model="loginForm" :rules="rules" ref="loginForms">
                    <h1>Hello</h1>
                    <h2>欢迎来到宠物之家</h2>
                    <el-form-item prop="username">
                        <el-input :prefix-icon="User" v-model="loginForm.username"></el-input>
                    </el-form-item>
                    <el-form-item prop="password">
                        <el-input type="password" :prefix-icon="Lock" show-password
                            v-model="loginForm.password"></el-input>
                    </el-form-item>
                    <el-form-item>
                        <el-button :loading="loading" class="login_btn" type="primary" size="default"
                            @click="login">登录</el-button>
                    </el-form-item>
                </el-form>
            </el-col>
        </el-row>
    </div>
</template>

<script setup lang="ts">
import { User, Lock } from '@element-plus/icons-vue';
import { reactive, ref } from 'vue';
import { useRouter, useRoute } from 'vue-router';
//引入用户相关的小仓库
import useUserStore from '@/store/modules/user';
import { ElNotification } from 'element-plus';
//引入获取当前时间的函数
import { getTime } from '@/utils/time';
let loginForms = ref();
let loading = ref(false);
let useStore = useUserStore();
//获取路由器
let $router = useRouter();
//获取路由对象
let $route = useRoute();
//收集账号与密码的数据
let loginForm = reactive({ username: 'admin', password: '111111' })
//登录按钮回调
const login = async () => {
    //保证全部表单项校验通过再发请求
    await loginForms.value.validate();
    //加载效果
    loading.value = true;
    //点击登录按钮以后干什么
    //通知仓库发登录请求
    //请求成功->首页展示数据的地方
    //请求失败->弹出登录失败信息
    try {
        //保证登录成功
        await useStore.userLogin(loginForm);
        //编程式导航跳转到展示数据首页
        //判断登录的时候，路由路径当中是否有query参数，如果有就往query参数跳转，没有就跳转到首页
        let redirect: any = $route.query.redirect;
        $router.push({ path: redirect || '/' });
        //登录成功的消息
        ElNotification({
            type: 'success',
            message: '欢迎回来',
            title: `Hi,${getTime()}好`
        })
        //登录成功加载效果消失
        loading.value = false;
    } catch (error) {
        //登录失败加载效果消失
        loading.value = false;
        //登录失败
        ElNotification({
            type: 'error',
            message: (error as Error).message
        })
    }
}
//自定义校验规则函数
const validatorUserName = (rule: any, value: any, callback: any) => {
    //rule:即为校验规则对象
    //value:即为表单元素文本内容
    //函数：如果符合条件callback放行通过
    //如果不符合条件callback方法，注入错误提示信息
    // if (/^[a-zA-Z]{5,10}$/.test(value)) {//字母
        if (value.length >= 5) {
        callback();
    } else {
        callback(new Error('账号长度至少5位'))
    }
}
const validatorPassword = (rule: any, value: any, callback: any) => {
    if (value.length >= 6) {
        callback();
    } else {
        callback(new Error('密码长度至少6位'))
    }
}
//定义表单校验需要的配置对象
const rules = {
    //规则对象属性：
    //required:代表这个字段是务必要校验的
    //min:文本长度至少是多少位
    //max:文本长度最多是多少位
    //message:错误的提示信息
    //trigger:触发校验表单的时机change：文本发生变化；blur：失去焦点时
    // username:[{required: true, min:5,max:10,message: '账号长度6-10', trigger: 'blur'}],
    // password:[{required: true, min:6,max:15,message: '密码长度6-15', trigger: 'change'}]
    username: [
        { trigger: 'change', validator: validatorUserName }
    ],
    password: [
        { trigger: 'change', validator: validatorPassword }
    ]
}
</script>

<style lang="scss" scoped>
.login_container {
    width: 100%;
    height: 100vh;
    background: url('@/assets/images/background.jpg') no-repeat;
    background-size: cover;

    .login_from {
        position: relative;
        width: 80%;
        top: 30vh;
        background: url('@/assets/images/login_form.png') no-repeat;
        background-size: cover;
        padding: 40px;

        h1 {
            color: white;
            font-size: 40px;
        }

        h2 {
            color: white;
            font-size: 20px;
            margin: 20px 0px;
        }

        .login_btn {
            width: 100%;
        }
    }
}
</style>
